maths --plse help me..

The diameter of a roller is 80 cm and its length is 126 cm. It takes 750 complete revolution once over to level a playground. find the area of the ground.

  1. 👍 0
  2. 👎 0
  3. 👁 95
  1. the roller's curved surface area is

    2pi r h = 2pi * 40 * 126 = 31667 cm^2

    750 revolutions will thus cover 23750420 cm^2 = 2375 m^2

    1. 👍 0
    2. 👎 0
    posted by Steve

Respond to this Question

First Name

Your Response

Similar Questions

  1. geomerty

    Paint Roller A has a length of 12 in. and a diameter of 2 in. Paint Roller B has a length of 8 in. and a diameter of 3 in. Which roller can spread more paint on a wall in one revolution

    asked by Hannah on May 26, 2013
  2. Maths

    Diameter and length of a roller are 84 cm and 120 CM respectively in how many revolutions can the roller level the playground of area 1584 m square

    asked by Aman on July 1, 2017
  3. Math

    Diameter and length of a roller are 84cm and 120cm .In how many revolutions can the roller level the playground of area 1584m²?

    asked by Sonu on June 13, 2016
  4. Maths

    The diameter and length of a roller are 84cm and 120 cm respectively in how many revolution can the roller level the playground of area 1584 Sq meter

    asked by Sanjay on August 28, 2017
  5. math

    the diameter of a roller is 70 cm and its length 1.12m. find the area of a playground, if it takes 250 complete revolutions to move once over the playground to level it.

    asked by vinay on February 5, 2017
  6. Physics

    A roller in a sheet-metal processing plant has a diameter of 1.77 m and a mass of 5871 kg. Assume the roller is a solid cylinder. a) What is the moment of inertia of the roller? b) What is the kinetic energy of the roller when it

    asked by Tina on July 7, 2013
  7. maths-surface area

    The diameter of a road roller is 140cm and its length is 2.2m. It takes 400 complete revolutions to move over to level a stretch of a road 2.2m wide find the surface area of stretch of road leveled in m sq.

    asked by anoynomous on March 12, 2013
  8. physics

    a roller whose diameter is 20 in weight 72 lbs. what horizontal force is necessary to pull the roller

    asked by peter on October 12, 2012
  9. Physics- Elena please help!

    Part of a roller-coaster ride involves coasting down an incline and entering a loop 30.0 m in diameter. For safety considerations, the roller coasters speed at the top of the loop must be such that the force of the seat on a rider

    asked by Mel on October 27, 2012
  10. physics

    Part of a roller-coaster ride involves coasting down an incline and entering a loop 27.0 m in diameter. For safety considerations, the roller coasters speed at the top of the loop must be such that the force of the seat on a rider

    asked by Anonymous on November 4, 2012

More Similar Questions